package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.webSocket.WebSocketServer;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Slf4j
@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单---最终目的：将订单数据存入到表中（orders和order_detail）
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional//开启事务
    public OrderSubmitVO submitOrders(OrdersSubmitDTO ordersSubmitDTO) {
        //异常情况的处理（收货地址为空、超出配送范围、购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        Long userId = BaseContext.getCurrentId();
        //查询购物车列表数据--只查询自己名下的购物车数据
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> cartList = shoppingCartMapper.list(shoppingCart);
        if (cartList == null || cartList.size() == 0) {
            throw new OrderBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //1.构造订单数据，存入到orders表中
        Orders orders = new Orders();
        //拷贝属性值
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        //补充缺失的属性值
        orders.setNumber(String.valueOf(System.currentTimeMillis()));//订单号
        orders.setStatus(Orders.PENDING_PAYMENT);                   //订单状态
        orders.setUserId(userId);                                   //用户id
        orders.setOrderTime(LocalDateTime.now());                   //下单时间
        orders.setPayStatus(Orders.UN_PAID);                        //支付状态
        orders.setPhone(addressBook.getPhone());                    //手机号
        orders.setConsignee(addressBook.getConsignee());            //收货人
        orderMapper.insert(orders);
        //2.构造订单详情数据，存入到order_detail表中
        List<OrderDetail> orderDetailList = new ArrayList<>();
        //遍历购物车列表数据，构造订单详情数据
        cartList.forEach(cart -> {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail, "id");
            //关联订单id
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        });
        //批量插入订单明细
        orderDetailMapper.insertBatch(orderDetailList);
        //3.清空购物车数据--自己名下的购物车列表数据
        shoppingCartMapper.clean(userId);
        //4.构造OrderSubmitVO对象并返回
        return OrderSubmitVO.builder()
                .id(orders.getId())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .orderTime(orders.getOrderTime())
                .build();
    }
    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

//        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );

        //生成空JSON，跳过微信支付流程
        JSONObject jsonObject = new JSONObject();

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
/*      // 模拟支付成功，更新数据库订单状态
        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(ordersPaymentDTO.getOrderNumber(), userId);
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);*/

        Map map = new HashMap();
        map.put("type",1);
        map.put("orderId",ordersPaymentDTO.getOrderNumber());
        map.put("content","订单号");
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

        return vo;
    }
    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();



    }
    /**
     * 订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */
    public PageResult pageQueryHistory(int pageNum, int pageSize, Integer status) {
        //1.设置分页参数，使用分页插件开始分页
        PageHelper.startPage(pageNum,pageSize);

        //条件分页查询
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        //返回分页结果（相当于返回所有历史订单数据）
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        //创建OrderVO列表用于封装返回数据
        List<OrderVO> list = new ArrayList<>();

        if(page != null && page.getTotal() > 0){
            //遍历分页中每一个订单对象
            for (Orders orders : page) {
                //获取当前订单id
                Long orderId = orders.getId();
                //用订单id去获取其对应的订单明细
                List<OrderDetail> dlist = orderDetailMapper.getByOrderId(orderId);

                //封装到VO
                //OrderVO继承了Orders中的所有数据（在OrderVO中存在extend Orders），因此可以将orders赋值给ordervo
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(dlist);

                //封装好的VO加入结果列表中
                list.add(orderVO);
            }
        }

        return new PageResult(page.getTotal(),list);
    }
    /**
     * 查询订单详情
     * @param id
     * @return
     */
    public OrderVO getById(Long id) {
        OrderVO orderVO = new OrderVO();

        Orders order = orderMapper.getById(id);
        BeanUtils.copyProperties(order,orderVO);

        List<OrderDetail> list = orderDetailMapper.getByOrderId(id);
        orderVO.setOrderDetailList(list);

        return orderVO;
    }
    /**
     * 查询历史订单
     *
     * @param page
     * @param pageSize
     * @param status   订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
     * @return
     */
    public PageResult pageQuery(int page, int pageSize, Integer status) {
        PageHelper.startPage(page,pageSize);
        Long userId = BaseContext.getCurrentId();
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setStatus(status);
        ordersPageQueryDTO.setUserId(userId);

        Page<Orders> pageResult = orderMapper.pagerQuery(ordersPageQueryDTO);

        // 查找出所有的order之后 还需要根据order的id去order_detail表中查找出相应的订单菜品
        List<OrderVO> records = new ArrayList<>();
        if(pageResult!=null && pageResult.size()>0){
            for (Orders order : pageResult) {
                Long orderId = order.getId();
                // 查询订单明细
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(order,orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                records.add(orderVO);
            }
        }
        return new PageResult(pageResult.getTotal(),records);
    }
    /**
     * 查询订单详情
     *
     * @param id 订单id
     * @return
     */
    public OrderVO details(Long id) {
        Orders orders = orderMapper.getById(id); // 根据订单id查询订单
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        // 查询该订单对应的菜品/套餐明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }
    @Override
    public void userCancelById(Long id) {
//        业务规则：
//        待支付和待接单状态下，用户可直接取消订单
//        商家已接单状态下，用户取消订单需电话沟通商家
//        派送中状态下，用户取消订单需电话沟通商家
//        如果在待接单状态下取消订单，需要给用户退款
//        取消订单后需要将订单状态修改为“已取消”
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) { // 状态大于2时取消订单抛出订单状态错误异常
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            //由于我们绕开了微信支付 固这段代码注释掉
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }
    /**
     * 再来一单
     *
     * @param id 订单id
     */
    public void repetition(Long id) { // 再来一单就是将原订单中的商品重新加入到购物车中
        Long userId = BaseContext.getCurrentId();

        //1.根据id查到订单详情表
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        //2.根据订单详情表生成购物车对象数据
        List<ShoppingCart> shoppingCart = new ArrayList<>();
        for (OrderDetail orderDetail : orderDetailList) {
            ShoppingCart shoppingCart1 = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail,shoppingCart1, "id"); // 拷贝属性时忽略id属性！
            shoppingCart1.setUserId(userId);
            shoppingCart1.setCreateTime(LocalDateTime.now());
            shoppingCart.add(shoppingCart1);
        }

        //经过测试，前端在调用再来一单前会调用清空购物车接口，所以无需我们在这里清空购物车

        //3.批量插入购物车数据到购物车表
        shoppingCartMapper.insertBatch(shoppingCart);
    }
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    //订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }
    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED); // 2待接单
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED); //3已接单
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS); //4派送中

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }
    /**
     * 接单
     *
     * @param ordersConfirmDTO
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        orderMapper.update(orders);
    }
    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     */
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
//        Integer payStatus = ordersDB.getPayStatus();
//        if (payStatus == Orders.PAID) {
//            //用户已支付，需要退款 我们由于绕开了微信支付 所以注释掉这些
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }
    /**
     * 取消订单
     *
     * @param ordersCancelDTO
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        //支付状态
//        Integer payStatus = ordersDB.getPayStatus();
//        if (payStatus == 1) {
//            //用户已支付，需要退款 我们由于绕开了微信支付 所以注释掉这些
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }

        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }
    /**
     * 派送订单
     *
     * @param id
     */
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.update(orders);
    }
    /**
     * 完成订单
     *
     * @param id
     */
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    @Override
    public void reminder(Long id) {
        Orders orders = orderMapper.getById(id);
        if(orders==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        else {
            Map map=new HashMap();
            map.put("type",2);//1.表示表单提醒,2.表示客户催单
            map.put("orderId",id);
            map.put("content","订单号:"+orders.getNumber());
            JSONObject json=new JSONObject(map);
            webSocketServer.sendToAllClient(json.toString());
        }

    }
}
